Typewriter



Dec. 21 1926.

O. A. HOKANSON TYPEWRITER Filed Febr ll. 1925 2 Sheets- Sheet l IWW@ @Wxl. N Q Mq N Y @l i o u Q L@ Dec. 21 1926.

O. A. HOKANSON TYPEWRITER Filed Feb. ll. 1925 2 Sheets-Sheet 2 j .M7272MAQ MM,

Patented Dec. 21, 1926.

OTT A. HOKANSON, OF W'OQDSTGCK, ILLNOIS, ASSIGNOR T0VOOIJ'STOCETYPEWRTER FAFCE.

COMPANY, F WOODSTOCK, ILLINOS, A CORPORATION OFILL'NOS.

TYPEWRITER.

Application filed February 11, 1925. Serial No. 8,351.

This invention relates to typewriter mechanism in which provision ismade for operating a type bar without actuating the escapement mechanismJfor shifting the car-- riage, and has :tor its object the provision ofsuch mechanism which will be simple Fig. 1 is a fra entar elevation withbn l n s parts 1n section, showing one embodiment oit the presentinvention; and

Fig. 2 is a fragmentary rear elevation of the parts shown in Fig. 1. Thenumeral designates the rack for controlling the transverse movement ofthe platen carriage, the rack being in mesh with 25 a pinion 11 carriedon a shaft 12 provided with an escapement wheel 13. A dog rocker 14 ispivotally mounted at 15 and is provided with dogs 16 and 17 forcontrolling.

the movementof the escapement .wheel 13. A spring not shown normallydraws the upper portion of the dog rocker 14 i'orwardly, the -amount ofoscillation of the dog rocker being controlled by stop screws 19 and 20which engage lixed stops. not shown. An adjustable contact screw 21 iscarried in the dog rocker 14 above the pivotal aXis thereof and inposition to register with a contact member in the form of an arm 22 on abell crank lever pivoted at 23 on a bracket 24. The bracket 24 carries astop 24 for limiting the movement of the contact member 22 to a positionin registration with the screw 21. -The Contact member 22 carries an ear22 for engaging the stop 24. The stop 24 also forms a backing member fortransmitting the force of the universal bar frame to the contact member22. The bracket 24 is secured by fasteners 25 to a bar 26 forming a partof the universal bar frame for the typewriter. The bar 26 is provlidedwith forwardly extending arms 27 which are connected with an arcuateuniversal bar 28 positioned in `the path of the type bars 29. The bar 26is provided with spaced downwardly extending arms 30 which are pivotedat 3140 downwardly extending legs 32 on a hanger yoke 33. The yoke 33'issupported on pivot screws 34 connected with' the machine traine.

rThe lever 22 is provided with a laterally extending arm 35 having alinger 36at its outer end which extends through an opening` in an arm 37of a bell crank lever pivoted at 38 on the arm 30 of the universal barframe. The leverk 37 is provided with a downwardly eintendinov arm39,',the lower end of which is provided with alcontact surface 40 inposition to engage a` lug 41 on an arm.. 42 carried by a sleeve 43mounted to oscillate upon a shaft 44. The shaft 44 i is `iournaled inposts 45 which project kupwardly from the base of the typewriter iframe.A crank arm 46 is secured to the sleeve 43 and is provided with alaterally extending pin 47. A plurality of slotted links 48 are mountedon the pin Y47 and are held in spaced relation by collars 49. Each ofthe links 48 is connected to a sub-lever 50 pivoted at 51 on thetypewriter frame.. rlhe sub-levers 50 are actuated by key levers 52 inthe usual manner. Each of the sublevers 50 is connected with a type bar29.

VThe shaltv 44 is provided with a crank arm 53 connected by a link 54 toa tailpiece 55 eXtendinOv downwardly from the dog rocker 14. A crank arm56 is connected to the shaft 44 and is provided with a pivotalconnection 57 to an arm 58. The arm 58 is connected with a letter spacebar, not shown. y

In the ordinary operation of the machine, the type bars strikey theuniversal bar 28 at the end of the stroke and move the bar 26rearwardly. This will cause the member 22 to engage the Contact screw 21and oscillate the dog rocker to efect a letter space movement of theplaten. In many languages there are letters which require accent vmarksand in order that these letters may be accented when desired without thenecessity hor" providing special type carrying the accent marks, thepresent invention provides for accent' keys. The spacing operation forthe particular letter in question is produced by the operation oit' thetype bar carrying the letter itseli' so that when the accent key isstruck the platen should not be shifted. These accent keys are eachactuated by a sub-lever having a link L8-connected with the pin 47. Thelinks 48 are provided with slots, as shown in Fig. l, which permit thetype bars to travel freely during the .rst part of their movement, butprior to the engagement of the type bars with the universal bar 28, theend of the slot in the link 4:8 will engage the pin 47 and partiallyrotate the sleeve 43 in a counter-clockwise direction, as viewed in Fig.l. Since the arm 42 is connected with the sleeve 43 this will raise thearm 42 to contact with the face l0 on the lever arm 39. This will rotatethe lever arm against the tension of a spring 59 swinging the arm 3Tdownwardly and lifting the arm 22 from in front of the Contact screw 2l.This will permit the movement of the bar 26 rearwardly without alfectingthe dog rocker and consequently the platen remains stationary. As manyaccented type bars 29 may be provided as desired. The key levers foractuating these type bars are commonly designed dead keys or silentkeys. Since the sleeve 43 is loosely journaled on the shaft 44, theshaft all is free Ato oscillate when the space bar is operated and thisoscillation will move the link 5a to shitt the dog rocker and Aeffectletter space movement of the platen carriage.

I claim:

l. In a typewriter, the combination with an escapement wheel, of a dogrocker for controlling said escapement wheel, a universal -member havinga stop thereon for actuating said dog rocker, a lever pivoted on saiduniversal member and having one arm thereof movable into and `out ofposition between said stop and dog rocker, a type bar, and connectingmeans between said type .bar and lever for shifting said `lever whensaid type bar is Operated.

2. In a typewriter, the combination with an escapeinent wheel, of a dogrocker toi controlling said escapement wheel, a universal bar frame torAactuating said dog rocker, a bracket mounted on said universal barframe having a stop `positioned in Yalinement with said dog rocker, abell crank lever pivoted on said bracket and having one arm thereofmovable into and out of registration with said stop to render said stopeffective for actuating said dog rocker, a second bell crank leverpivoted on said universal bar frame for actuating said tiret-named bellcrank lever, an oscillating member for actuating said second named bellcrank lever, a type bar, and means having a lost motion connectionbetween said type bar and oscillating member to ei'l'ect movement or'said oscillating member and said bell crank levers during the latterpart of movement oi said type bar.

In a typewriter, the conibination with escapement mechanism, of auniversal mem- -ber for actuating said escapement mechanism, a. rockshaft, letter space mechanism connected with said rock shaft `foractuating said escapement mechanism to produce letter space movement, asleeve journaled on said rock shaft, type bars for actuating saiduniveral member, means operated by said sleeve for rendering saiduniversal member inoperative to etiect actuation ol' said escapementn'iechanism, and means actuated in unison with one o'l said type barstor el'liecting operation ot said sleeve when said type bar is operated.

4f. In a typewriter, the combination with escapement mechanisnno'f a dogrocker for controlling said mechanism, a rock shaft for moving said dogrocker, a nnversal member for moving said dog rocker, letter spacemechanism for operating said rock shaft, type bars for operating saiduniversal member, a sleeve journaled on said rock shaft, means connectedwith said sleeve -for rendering said universal member inoperative tooscillate said dog rocker, and means selectively connecting said sleevewith a number otl special ones of said type bars to cause said Asleeveto be. oscillated thus rendering said dog rocker inoperative when Ysaidspecial type bars are operated.

In testimony whereof I have signed my name to this specification on this5th day of February A. D. 1925.

OTTO A. HOKANSON.

